Bi-metal hole saw 20 mm

The 20 mm bi-metal hole saw 56T703 by GRAPHITE, with a height of 51 mm, allows drilling to a depth of 38 mm. It is made from HSS high speed steel and is fitted with a 1/2'' x 20 UNF thread. It is designed to work in metal, stainless steel (Inox), cast iron, brass, aluminium and wood. The GRAPHITE hole saw is recommended to be used with the 56T753 adapter with pilot drill bit for bi-metal hole saws in the 14-30 mm range. Maximum speeds for this tool, vary depending on the material: steel - 445 rpm, Inox steel - 220 rpm, aluminium - 660 rpm, wood - 520 rpm, cast iron - 290 rpm, brass - 580 rpm. The bi-metal hole saw is designed for use with a drill or drill/driver.